GH-93143: Don't turn `LOAD_FAST` into `LOAD_FAST_CHECK` by brandtbucher · Pull Request #99075 · python/cpython · GitHub

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brandtbucher:maybe-bind-fast-local

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Pull requests 2.6k

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Dataflow analysis in the compiler to avoid runtime NULL checks #93143

Just assign None instead of changing co_code

Feedback from code review

Perform assignments *before* adjusting the stack

Address code review

awaiting core review

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Convert DELETE_FAST to LOAD_FAST_CHECK POP_TOP DELETE_FAST as a size optimization faster-cpython/ideas#490

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"RuntimeWarning: assigning None to unbound local": an inscrutable error #124118